Mismatch: X:28 doesn't match requested X:29
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9646-session.ps) >>/Users/jc/w/tmp/Tune-9646-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Ireland/session/session.abc

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.60 512x512 PNG]
filesizedescription
Tune-9646-get.log 27389 Log file, useful mostly for debugging
Tune-9646-session.abc 582 ABC music file with the extracted tune(s)
Tune-9646-session.ps 35566 PostScript
Tune-9646-session.txt 582 Plain-text file with the extracted tune(s)
Tune-96465-get.log 1518 Log file, useful mostly for debugging
These files should be available for 24 hours.